Puppy Nutrition and Exercise: How to Raise a Healthy Dog from Day One

By Dr Duncan Houston

Quick Answer

Puppies need a complete and balanced growth diet, controlled calorie intake, and appropriate exercise to develop properly. Feeding the wrong diet or over-exercising can lead to long-term health issues, especially in large breeds. Consistency, balance, and early guidance are key.

Raising a puppy is exciting, chaotic, and occasionally… a bit of a guessing game.

Am I feeding enough? Too much?
Is this exercise okay? Or too much?

The early months matter more than most people realise. This is where bones, joints, and lifelong habits are built. Get it right early, and everything becomes easier later.

What to focus on from the start

If you want to keep things simple, focus on three things:

1. Feed a proper growth diet

2. Keep your puppy lean

3. Avoid overdoing exercise

Most problems come from getting one of these wrong.

Why nutrition matters for puppies

Puppies are not just small adult dogs.

They are growing rapidly and need:

• higher energy intake

• increased protein

• carefully balanced calcium and phosphorus

• essential vitamins and minerals

A proper puppy diet supports:

• bone development

• muscle growth

• immune function

Always choose a diet labelled for growth or all life stages.

Puppy food vs adult food

This is one of the most common mistakes.

Adult food is not designed for growth.

Problems with feeding adult diets include:

• insufficient minerals for bone development

• incorrect calcium to phosphorus ratios

• increased risk of skeletal issues

Stay on puppy food until:

• small to medium breeds → around 12 months

• large to giant breeds → 18 to 24 months

Large-breed puppy diets

Large-breed puppies need extra care.

Growing too fast is the problem, not growing too slow.

Large-breed diets are designed to:

• control calorie intake

• reduce growth rate

• manage calcium levels

This helps reduce the risk of conditions like hip dysplasia and other joint diseases.

Controlling calories properly

If your puppy is gaining weight too quickly, don’t switch foods.

Adjust the amount instead.

Focus on:

• regular weight checks

• body condition scoring

• keeping your puppy slightly lean

A lean puppy is a healthier puppy long term.

Homemade diets for puppies

This is where things can go very wrong.

Puppy nutrition is precise. Small imbalances can lead to major problems.

Common risks:

• incorrect calcium and phosphorus levels

• missing essential nutrients

• long-term bone and joint disease

If you want to feed a homemade diet, it needs to be formulated properly by a veterinary nutritionist.

What if your puppy is overweight

It happens more often than people think.

To correct it safely:

• reduce portion size slightly

• increase controlled, low-impact activity

• monitor progress weekly

Avoid extreme calorie restriction. Puppies still need nutrients to grow.

Developmental orthopedic disease

If your puppy is:

• limping

• stiff

• reluctant to move

…this needs attention early.

Diet and exercise both play a role here.

Early intervention can prevent lifelong issues.

Exercise guidelines for puppies

Puppies love to run, jump, and go all in.

That doesn’t mean they should.

Avoid:

• long runs or forced exercise

• excessive jumping

• intense agility training too early

Focus on:

• short walks

• free play

• controlled social interaction

• swimming (if appropriate)

Think of your puppy like a kid. Active, yes. Built for endurance, not yet.

Mental enrichment matters

A tired puppy is not just physically tired.

Mental stimulation is just as important.

Good options include:

• puzzle toys

• scent games

• short training sessions

This reduces boredom and prevents destructive behaviour.

Signs something may not be right

Watch for:

• rapid weight gain

• poor growth

• limping or stiffness

• low energy

• digestive issues

If something feels off, it’s worth checking early.

Diagnosis and support

If concerns arise, your vet may recommend:

• growth monitoring

• dietary review

• imaging if joint issues are suspected

Catching problems early makes a huge difference.

FAQ

When should I switch my puppy to adult food

Around 12 months for small breeds and up to 24 months for large breeds.

How much exercise does a puppy need

Short, controlled activity is best. Avoid forced or high-impact exercise.

Is it okay for puppies to be slightly chubby

No. Keeping puppies lean is important for joint health.

Can I cook for my puppy

Only if the diet is properly formulated. Guessing can cause serious problems.

Final thoughts

Raising a puppy well is about getting the basics right.

• correct nutrition

• controlled growth

• appropriate exercise

There’s no shortcut here, but there is a clear path.

Get it right early, and you set your dog up for a much healthier life.

Still unsure what to do next?

Puppy care comes with a lot of small decisions.

Are you feeding the right amount?
Is this exercise okay?
Are they growing normally?

If you’re unsure, getting guidance early helps you avoid problems before they start.

The ASK A VET™ app gives you access to veterinary advice when you need it, so you can raise your puppy with confidence instead of guessing.